Guard for printing-press rolls



April 1931- G. G. M CAFFERTY GUARD FOR PRINTING PRESS ROLLS Filed Feb. 10', 1950 ea we E00 Geo?" by Patented A aas, 1931 I 4 1 UNITED STATES PATENT @FFICE GEORGE G. MAcCAFFEB-TY, OF EVER-FEET, MASSACHLITSETTS V GUARD FOR PRINTING-PRESS ROLLS Application filed February 10, 1930. Serial No. 427,080.

This invention relates to an improvement a guard embodying my invention being assoin guards for printing press rolls. ciated therewith. I 7

In certain localities, state laws ormunicipal Fig. 2 is a partial side elevation and partial ordinances make it obligatory that guards be longitudinal section of the guard which is provided 011 printing presses adjacent to the shown mounted between the side frames of printing rolls where there is danger of the a printing press. pressman catching his hand in the rolls when Fig; 3 1s a transverse section taken on the threading the paper therebetween. In most line 3--3, Fig. 25 looking in the direction of presses the guard that is provided consists the arrows on said line.

10 of an ordinaryangle bar of iron or steel, and Fig. 4 is a transverse section taken on the although aha-r of this type serves satisfactol1ne 44 of Fig. 1, looking in the direction rily as a guard, nevertheless it is a continual of the arrows on said line. menace to the machine for the reason that Like numerals refer to like parts throughoccasionally the .type plates that are clamped out the several views of the drawings.

15 to the printing rolls become loosened acci-' In thevdrawings, 5 and 6 represent a pair dentally during the operation of the press and of co-operating printing press rolls or cylinbefore this is discovered and the press ders, the. roll 5 havingthe usual type plates 7 brought to a stop the plates become so disclamped thereon in the usual well-known I placed upon the rolls that they contact with manner and the roll 6 having the usual cush-.

20 the underside of the bar and cause the lation 8 secured thereto in a wellknown manner. ter to be broken or sprung between the rolls The rolls 5 and 6 are rotated in the direction where upon being crushed they cause serious of the arrows, Fig. 1 and a strip of paper 9 injury not only to the type plates and cushion is fedbetween the rolls as indicated in Fig. 1.

- upon the rolls, but also to the rolls and other The rolls 5 and 6 are mounted in any suitable parts iat d th ith f l manner upon side frames 10 of the printing 7 the shafts, bearings and driving gears for the pr ss.

rolls. So far as the type plates and cushion ed twe n the rolls 5 and 6 and diare concerned, these parts may be easily rerectly beneath the pointwhere the type plates placed, but the damage to the rolls and sup- 7 Contact w the P p 9 i a guard the 1 T i d guard f i i press 11 therein a hollow intermediate portion trian- '40 tirely to the type plates and cushion and no porting and driving means therefor often pp te d P n f which are secured caus rio h td f th press til tothe inner surfaces of the side frames 10 by the damaged parts are repaired or replaced. means of brackets; 12 and The wa is The Object f this invention is to provide an constructed of thin sheet metal and embodies structed in such a manner that if it is hit as g l i fQ e g of n d side r" i above mentioned and forced between the 14c and l and n under slde the latter rolls, it will collapse and be crushed in such actmg to remforce the slde pol'tlons at the bottom thereof. a manner that the damage W111 be confined (m- One edge port-ion of the strip of sheet material of which the uard llis formed is bentv 1n ury Wlll be sustained by the rolls, or the to form a rib which extends shafts bearings or driving gears for Said the entire length of the guard at the top there- TOHS- of, and an opposite edge 18 of said strip of The lnventlon conslsts m a guard for the sheet material. projects into the U-shaped i I'OllS Of a press as set forth in the 01- portion and is cla nped bet een the OPPO- '50 two co-operating printing rolls or cylinders, yond the hollow triangular portion thereof at lowing specification and particularly as site sides thereof. The portions .17 and 18 polnted out in the clalms thereof. 'co-operate to provide a reinforcing and stif- Referring to the drawings: fening means for the'topof the guard 11.

Fig. 1 represents a sectional elevation of The end portions of the guard 11 extend bewe 19 and are open upon their undersides at 20, the material of the underside 16 being bent upwardly through the openings 20 to form an inclined end portion 21 for the hollow intermediate portion. The end portions 19 are angular in form and are reinforced by angle plates 22, the sides of whichfit closely against the sides 14 and 15. The angle plates 22 are held firmly in position by bending the lower edge portions of thesides 14 and inwardly and upwardly at 23 and 2A respectively and thereby enclosing the edge por tions of the angle plates 22. The angle plates 22 extend from the ends of the guard 11 to a point within the hollow intermediate portion, terminating at 25, see Fig. 2. The brackets 12 and 13 which secure the guard to the side frames 10 of the printing press are secured to the under surface of the end portionsof the guard.

The action of the device hereinbefore specifically described is as follows :-Assuming that a type plate 7 becomes loosened upon the type roll 5, or possibly that the cushion 8 becomes loosened upon the roll 6; if either plate or cushion hits the under side of the guard 11 causing the latter to break or be sprung upwardly between said rolls, the guard, owing to its thin hollow construction will collapse very easily and be so crushed between the rolls that all the damage willbe confined to with and constituting extensions therefor, and means to reinforce said end portions.

5. A guard for printing press rolls having, in combination a hollow triangular intermediate portion constructed of thin sheet metal, angular end portions formed integral therewith and constituting extensions therefor, and an angle plate of thin sheet metal contacting with the sides of said end portions and reinforcing the same.

6. A guard for printing press rolls comprising an angular member constructed of sheet material and embodying therein converging side portions, each terminating at its upper edge in a longitudinal flange, said flanges co-operating with each other to reinforce the angular member at the top thereof, and other reinforcing means for the lower po l t'ions of said angular member;

A guard for printing press rolls comprising. an angular member constructed of sheet material and embodying therein converging side portions, one of said side portions terminating 1n a U-shaped rib and the othero-f said side .portions projectin'g between the sides of said rib and co-operative with the latter to reinforce theangular member.

In testimony whereof I have hereunto set frny hand.

GEORGE e. 'MAQGAFAFERTY.

the type plates 7 and the cushion 8, and these A can be easily and quickly replaced. There will be no injury'wha-tever to the rolls or the shafts, bearings or gears that are associated therewith. Although the guard is constructed of very thin sheet material, it is, nevertheless, sufliciently rigid because of its hollow triangular construction to answer all the requirements as a guard for the protection of juring the rolls and/or the supporting and driving means therefor.

3. A guard for printing press rolls having in combination,.a hollow triangular intermediate portion and angular end portions all constructed of thin sheet material and capable of beingcrushed between said rolls without injuring the rolls and/or the supporting and driving means therefor. v V 4;. A guard for printing press rolls having,

in combination a hollow triangular intermediate portion constructed of thin sheet metal, angular end portions formed integral there- 

